WO2015109520A1

WO2015109520A1 - Method and apparatus for transmitting uplink control information, and communications system

Info

Publication number: WO2015109520A1
Application number: PCT/CN2014/071356
Authority: WO
Inventors: 张磊; 王轶; 周华
Original assignee: 富士通株式会社; 张磊; 王轶; 周华
Priority date: 2014-01-24
Filing date: 2014-01-24
Publication date: 2015-07-30

Abstract

Embodiments of the present invention provide a method and an apparatus for transmitting uplink control information, and a communications system. The transmission method comprises: when a power capable of being used for transmitting a PUCCH in a subframe does not reach a transmit power that is configured by a first base station for a user equipment and is used for transmitting the PUCCH, the user equipment reducing the number of bits of information borne by the PUCCH; and transmitting, to the first base station, the PUCCH of which the number of bits of information has been reduced. By means of the embodiments of the present invention, in a case in which a total transmit power exceeds a maximum transmit power supported by a user equipment, the number of bits of information borne by a PUCCH is reduced while PUCCH transmission is kept as far as possible, so that unnecessary transmission can be reduced and excessive resource waste can be avoided.

Description

Method, device and communication system for transmitting uplink control information

The present invention relates to the field of communications, and in particular, to a method, an apparatus, and a communication system for transmitting uplink control information. Background technique

In the future mobile communication, in order to ensure coverage and adjust the service requirements and equipment costs reasonably, the heterogeneous deployment of the macro cell and the small cell coexistence will become the mobile communication system. One of the main deployment scenarios; where the macro cell is responsible for the user's coverage, and the small cell is responsible for the user's data offload (offl ₀ ading). When a macro cell and a small cell are deployed in a heterogeneous manner, a user equipment (UE) can be commonly served by a macro cell and a small cell simultaneously by carrier aggregation or dual connectivity.

The small cell may be classified into a micro cell, a Pico cell, a femto cell, and the like according to the transmit power of the small cell and the coverage capability and the like. On the other hand, since the small cell device is small in size and easy to deploy and maintain, the small cell can be deployed by the operator like a macro cell or by users (for example, commercial users and home users). This flexible deployment of small cells may result in different small cells having different backhaul capabilities; for example, some small cells deployed by operators may have fiber or wireless transmission feedback capabilities, while some small cells deployed by users may There is only feedback capability at the level of DSL (Digital Subscriber Line). Different feedback capabilities involve the data transmission capability of the feedback transmission, and on the other hand, different delays.

In the discussion of version 10 and version 11 of the LTE (Long Term Evolution), the heterogeneous deployment scenario in which the macro cell and the small cell coexist is one of the typical application scenarios of carrier aggregation. In carrier aggregation, a carrier used to maintain a radio resource control (RRC) connection is called a primary component carrier (PCC) or a primary cell (PCell), and other carriers are called secondary component carriers. (SCC, Secondary Component Carrier) or secondary cell (SCell).

In LTE Release 10 and Release 11, the primary considered small cell is deployed by the operator, so there is an ideal backhaul connection between the small cell and the macro cell, that is, there is almost no time between the small cell and the macro cell. Delayed communication, and carriers that can normally perform carrier aggregation (whether macro or small) belong to the same eNB. Therefore, in these versions of the standard, when a UE is simultaneously When two or more carriers (cells) are serving, no matter which carrier (PCC or SCC) is sent to the UE's Physical Downlink Shared Channel (PDSCH), the corresponding ACK/NACK information is The feedback is preferentially performed on the physical uplink control channel (PUCCH, Physical Uplink Control Channel) of the PCell.

In the discussion of LTE Release 12, small cells with no non-ideal backhaul capabilities became the main research object. This carrier aggregation without ideal feedback is called dual-connectivity, because the typical application scenario at this stage is that the carrier for carrier aggregation belongs to two eNBs, and there is no ideal feedback between the two eNBs; Ideal feedback between carriers within any one eNB. The primary eNB is called a Master eNB (MeNB) and usually includes a macro cell. The secondary eNB is called Secondary eBN (SeNB), which usually includes a small cell. There is usually no ideal feedback connection between the MeNB and the SeNB.

In the discussion of LTE Release 12, the maximum delay for non-ideal feedback is 60ms. Taking the OFDM frequency division duplex (FDD) carrier as an example, starting from the eNB to transmit a PDSCH to the UE, the method includes: the UE receives the PDSCH and demodulates and decodes the data, determines whether the received data is correct, and according to The result of the correctness or not generates ACK or NACK information accordingly, sends ACK/NACK information to the eNB, and the eNB receives the ACK/NACK information and successfully interprets the above process, and the above process cannot exceed 8 ms. Therefore, if the ACK/NACK of the PDSCH of all carriers is fed back on the PCell of the MeNB, the carrier of the SeNB is used in the dual connectivity of the LTE Release 12, if the carrier aggregation scheme with the ideal feedback is used in LTE Release 10 and Release 11 The ACK/NACK information will be severely timed out, causing the UE and the cell under the SeNB to fail to communicate according to the provisions of the existing standards.

It should be noted that the above description of the technical background is only for the purpose of facilitating the clear and complete description of the technical solutions of the present invention, and is convenient for understanding by those skilled in the art. The above technical solutions are not considered to be well known to those skilled in the art simply because these solutions are set forth in the background section of the present invention. Summary of the invention

Therefore, in the subsequent discussion of LTE Release 12, there may be PUCCH transmissions on the PCell of the MeNB and the PCell of the SeNB. A more efficient transmission method is: In any subframe, the UE can simultaneously transmit the PUCCH on the uplink carrier of the PCell of the MeNB and the uplink carrier of the PCell of the SeNB.

The above and below "PCell on SeNB" is just a designation indicating that it is a relatively special cell within the SeNB from the perspective of the UE, and it should be configured with both the uplink carrier and the downlink carrier. And this The uplink carrier of the special cell may include at least the PUCCH resource configured for the UE, that is, the UE may send the PUCCH to the SeNB through the uplink carrier of the cell. This term neither indicates nor denies that the cell must have exactly the same functionality as the MeNB's PCell. This designation also does not negate that one or more of the cells other than the cell in the SeNB have some or all of the functions of the cell.

Due to the above-mentioned non-ideal feedback, the MeNB and the SeNB are not able to perform the power control information for scheduling the UE in real time. Therefore, the power used by the UE to transmit the PUCCH to the MeNB on the PCell of the MeNB in one subframe is controlled by the MeNB, and the UE is in the UE. The power used by the SeNB to transmit the PUCCH to the MeNB is controlled by the SeNB. In this case, in some subframes, the sum of the transmit powers configured by the two eNBs for the UE may exceed the maximum transmit power that the UE can support or the maximum transmit power allowed by the UE. Considering the importance of the MeNB and ensuring that the transmission power of the PUCCH of the MeNB is a reasonable choice, the PUCCH transmission of the SeNB can be directly abandoned.

However, this causes the PDSCH of all the cells in the SeNB corresponding to the uplink subframe to be resent, which increases unnecessary transmission and causes waste of resources.

Embodiments of the present invention provide a method, an apparatus, and a communication system for transmitting uplink control information. By reducing the number of information bits carried by the PUCCH and keeping the PUCCH transmission as much as possible, unnecessary transmission can be reduced.

According to a first aspect of the embodiments of the present invention, a method for transmitting uplink control information is provided, where the transmission method includes:

The number of information bits carried by the PUCCH is reduced when the power of the PUCCH that can be used by the user equipment to transmit the PUCCH in a certain subframe is not up to the transmission power of the PUCCH configured by the first base station for the user equipment; The PUCCH after the first base station transmits the number of reduction information bits.

According to a second aspect of the embodiments of the present invention, a transmission apparatus for uplink control information is provided, where the transmission apparatus includes:

The information processing unit reduces the number of information bits carried by the PUCCH when the power that can be used to transmit the PUCCH in a certain subframe does not reach the transmit power for transmitting the PUCCH configured by the first base station for the user equipment;

And an information transmission unit that transmits the PUCCH after reducing the number of information bits to the first base station.

According to a third aspect of the embodiments of the present invention, a communication system is provided, where the communication system includes: a user equipment, where a power that can be used to transmit a PUCCH in a certain subframe cannot reach the first base station as the user equipment. When the configured transmit power for transmitting the PUCCH is configured, the information bits carried by the PUCCH are reduced. And the PUCCH after transmitting the reduced number of information bits to the first base station;

The first base station receives the PUCCH transmitted by the user equipment in the subframe.

According to a fourth aspect of the present invention, a method for transmitting uplink control information is provided, where the transmission method includes:

Receiving, by the base station, a PUCCH that is transmitted by the user equipment in a certain subframe; where the power of the user equipment that can be used for transmitting the PUCCH is less than the transmit power of the base station configured for the user equipment for transmitting the PUCCH The number of information bits carried by the PUCCH is reduced.

According to a fifth aspect of the present invention, a transmission apparatus for uplink control information is provided, where the transmission apparatus includes:

The information receiving unit receives the PUCCH transmitted by the user equipment in a certain subframe, where the power of the user equipment for transmitting the PUCCH does not reach the transmission power of the PUCCH configured by the base station for the user equipment The number of information bits carried by the PUCCH is reduced.

According to still another aspect of the embodiments of the present invention, a computer readable program is provided, wherein when the program is executed in a user equipment, the program causes a computer to perform uplink control information as described above in the user equipment Transmission method.

According to still another aspect of an embodiment of the present invention, a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a transmission method of uplink control information as described above in a user equipment.

According to still another aspect of the embodiments of the present invention, a computer readable program is provided, wherein when the program is executed in a base station, the program causes a computer to perform a transmission method of uplink control information as described above in the base station .

According to still another aspect of an embodiment of the present invention, a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a transmission method of uplink control information as described above in a base station.

The beneficial effects of the embodiments of the present invention are: in the case that the sum of the transmit power exceeds the maximum transmit power that the UE can support, the number of information bits carried by the PUCCH is reduced, and the transmission of the PUCCH such as the SeNB is retained as much as possible, and unnecessary PDSCH, for example, can be reduced. Transmission, avoiding excessive waste of resources.

Specific embodiments of the present invention are disclosed in detail with reference to the description and the accompanying drawings, in which, It should be understood that the embodiments of the invention are not limited in scope. In The embodiments of the present invention include many variations, modifications, and equivalents within the scope of the spirit and scope of the appended claims. Features described and/or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, in combination with, or in place of, features in other embodiments. .

It should be emphasized that the term "comprising" or "comprising" is used to mean the presence of a feature, component, step or component, but does not exclude the presence or addition of one or more other features, components, steps or components. DRAWINGS

Many aspects of the invention can be better understood with reference to the following drawings. The components in the figures are not drawn to scale, but only to illustrate the principles of the invention. In order to facilitate the illustration and description of some parts of the invention, the corresponding parts in the drawings may be enlarged or reduced.

The elements and features described in one of the figures or one embodiment of the invention may be combined with elements and features illustrated in one or more other figures or embodiments. In the accompanying drawings, like reference numerals refer to the

1 is a schematic flow chart of a transmission method according to Embodiment 1 of the present invention;

2 is another schematic flowchart of a transmission method according to Embodiment 1 of the present invention;

3 is a schematic flow chart of a transmission method according to Embodiment 2 of the present invention;

Figure 4 is a block diagram showing a configuration of a transmission apparatus according to Embodiment 3 of the present invention;

5 is a schematic block diagram showing a system configuration of a user equipment according to Embodiment 3 of the present invention;

Figure 6 is a block diagram showing a configuration of a transmission apparatus according to Embodiment 4 of the present invention;

Figure 7 is a schematic block diagram showing the system configuration of a base station according to Embodiment 4 of the present invention;

Figure 8 is a block diagram showing the configuration of a communication system according to a fifth embodiment of the present invention.

detailed description

The foregoing and other features of the invention will be apparent from the The specific embodiments of the present invention are disclosed in the specification and the drawings, which are illustrated in the embodiments of the invention The invention includes all modifications, variations and equivalents falling within the scope of the appended claims.

Example 1 The embodiment of the invention provides a method for transmitting uplink control information, and the invention is described from the user equipment side. FIG. 1 is a schematic flowchart of a transmission method according to an embodiment of the present invention. As shown in FIG. 1, the transmission method includes:

Step 101: The power of the PUCCH that can be used by the user equipment in a certain subframe is less than the transmission power of the PUCCH configured by the first base station for the user equipment, and the information ratio of the PUCCH is reduced.

Step 102: The user equipment transmits, to the first base station, a PUCCH after reducing the number of information bits.

In this embodiment, the first base station may be a SeNB, and the first base station may configure, for the user equipment, a transmit power for transmitting the PUCCH, for example, may be denoted as P1. The user equipment has the maximum allowed transmit power due to its own capabilities or limitations imposed by the base station side, etc., and has power that can be used to transmit PUCCH in one subframe, for example, can be recorded as Pc.

When Pc does not reach PI (Pc<Pl), for example, it is necessary to drop the transmission of the PUCCH, which may cause the base station to need to transmit the PDSCH again, and unnecessary transmission occurs. On the other hand, in the embodiment of the present invention, the number of information bits carried by the PUCCH can be reduced, and the PUCCH after the number of information bits is reduced can be transmitted to the base station. Therefore, the base station does not need to transmit the PDSCH again, and excessive resource waste can be avoided.

In this embodiment, the user equipment may transmit the PUCCH to the first base station and the second base station, respectively, where the first base station may be the SeNB, the second base station may be the MeNB, or the first base station may be the base station of the small cell, The second base station may also be a base station of the macro cell. However, the present invention is not limited thereto, and a specific base station can be determined according to actual conditions.

Furthermore, the invention is not limited to scenarios in which two base stations serve user equipment. For example, it may be applied to a scenario in which a PUCCH is transmitted only to one base station, or is also applicable to a scenario in which a PUCCH is transmitted to two or more base stations. Hereinafter, the PUCCH is transmitted to the SeNB and the MeNB by the user equipment as an example for description.

FIG. 2 is another schematic flowchart of a transmission method according to an embodiment of the present invention. As shown in FIG. 2, the transmission method includes:

Step 201: When transmitting the PUCCH to the second base station and the first base station, the user equipment determines, by the first base station, the transmit power (for example, P1) configured for the user equipment to transmit the PUCCH and the second base station configured for the user equipment. Whether the sum of the transmit power (e.g., P2) used to transmit the PUCCH is greater than the allowed maximum transmit power (e.g., Pmax) of the user equipment;

The maximum transmit power allowed may be the maximum transmit power allowed by the base station side, or Refers to the maximum transmit power allowed by the user equipment's own capabilities. However, the present invention is not limited to the above two cases.

When Pl+P2>Pmax, step 202 is performed; when Pl+P2 Pmax, step 203 is performed.

Step 202: The user equipment determines whether the transmit power (for example, P2) configured by the second base station for transmitting the PUCCH is less than or equal to the maximum transmit power of the user equipment.

At P2 Pmax, step 204 is performed; when P2 > Pmax, step 207 is performed.

Step 203: The user equipment transmits a PUCCH to the first base station by using the transmit power (P1) for transmitting the PUCCH configured by the first base station, and the UE is configured to transmit the PUCCH by using the second base station as the user equipment. Power (P2) transmits the PUCCH to the second base station.

Step 204: The user equipment transmits the PUCCH to the second base station by using the transmit power (P2) configured by the second base station for transmitting the PUCCH.

In this embodiment, if the transmit power remains after the PUCCH is transmitted to the second base station by P2 (Ps = Pmax - P2, Ps > 0), the method further includes:

Step 205: The user equipment reduces the number of information bits carried in the PUCCH transmitted to the first base station. Step 206: The user equipment transmits the PUCCH after reducing the number of information bits to the first base station.

Step 207: The user equipment transmits the PUCCH to the second base station with the maximum allowed transmit power Pmax. It is to be noted that FIG. 2 only schematically shows the transmission method of the present invention, but the present invention is not limited thereto. For example, the order of execution of the above steps can also be adjusted according to actual conditions.

In the embodiment shown in FIG. 2, the UE needs to simultaneously transmit a PUCCH to a second base station (e.g., MeNB) and a first base station (e.g., SeNB) in a certain subframe. The sum of the total powers of the PUCCHs configured by the MeNB and the SeNB exceeds the maximum power that the UE can bear. The UE transmits the PUCCH of the MeNB configured by the MeNB to the PUCCH of the MeNB; and the PUCCH for the SeNB adopts the method of the present invention. Thereby, the PUCCH of the SeNB can be transmitted by using the remaining power other than the PUCCH of the transmitting MeNB (the uplink transmission power that the SeNB does not configure for the user equipment).

In an embodiment, in step 102 or step 206, the PUCCH after the number of information reduction bits is transmitted to the first base station may include: when the user equipment is configured by the first base station to adopt a PUCCH format capable of carrying multiple carrier feedbacks, The user equipment uses the PUCCH format that carries only a single carrier feedback in the subframe to transmit the ACK/NACK information corresponding to the first cell of the first base station.

For example, if the eNB configures the UE to adopt a PUCCH format that can carry multiple carrier ACK/NACKs (PUCCH Format) is transmitted, and the UE transmits the ACK/NACK information corresponding to the eNB subordinate PCell by using only the PUCCH format of the ACK/NACK carrying only a single carrier.

It is worth noting that the first cell in the first base station (e.g., SeNB) is referred to as Pcell, for example. As mentioned earlier, the above and below "PCell on SeNB" is just a designation indicating that it is a relatively special cell within the SeNB from the perspective of the UE, and it should be configured with both the uplink carrier and the downlink carrier. The uplink carrier of the special cell may include at least the PUCCH resource configured for the UE, that is, the UE may send the PUCCH to the SeNB through the uplink carrier of the cell. This term neither indicates nor denies that the cell must have exactly the same functionality as the MeNB's PCell. This designation also does not negate that one or more of the cells other than the cell in the SeNB have some or all of the functions of the cell.

In this embodiment, the PUCCH format that can carry multiple carrier feedbacks may be PUCCH Format 3 or PUCCH Format lb with channel selection; the PUCCH format that carries only a single carrier feedback may be PUCCH Format la or PUCCH Format. Lb. However, the present invention is not limited thereto, and may be other PUCCH formats, for example.

In this embodiment, the method may further include: the user equipment abandons the ACK/NACK information corresponding to the second cell of the first base station (for example, other cells than the PCell) in the subframe; and abandoning the transmission of the first base station. Corresponding periodic CQI information.

For example, the UE will drop the transmission of ACK/NACK information corresponding to all cells except the PCell of the eNB in the subframe. In this case, if there is feedback in the subframe and the periodic CQI information of any cell under the eNB, the UE will also give up the feedback of the CQI information.

In another embodiment, in step 101 or step 205, reducing the number of information bits carried by the PUCCH may include: when the user equipment is configured by the first base station to adopt a PUCCH format capable of carrying multiple carrier feedback, the user equipment Spatial HARQ-ACK bundling is performed within a subframe.

For example, if the eNB configures the UE to perform ACK/NACK transmission using a PUCCH format (eg, PUCCH Format 3) that can carry multiple carrier ACK/NACKs, the UE performs spatial HARQ-ACK bundling in each subframe of each subcarrier (spatial HARQ) - ACK bundling), whether or not the conditions for implementing the spatial HARQ-ACK bundling specified by the existing standards are met on the subcarrier.

Referring to the standard TS36.213, spatial HARQ-ACK bundling, for example, means that when the UE receives two transport blocks (TB, Transport Block) in the same subframe (Subframe) of the same carrier, the UE Logically AND the ACK/NACK information corresponding to the two TBs, thereby One bit of ACK/NACK information is obtained.

Following the existing standards, each UE supports up to 5 carriers. If a UE is configured with 5 carriers, in the case of performing spatial HARQ-ACK bundling, when all carriers are FDD carriers, a Format3 PUCCH carries a maximum of 6 bits (below the number of information bits is 11) Bit), where 5 bits are ACK/NACK information (10 bits before the number of information bits is reduced), and 1 bit is Schroughing Request (SR) information.

In another embodiment, in step 101 or step 205, reducing the number of information bits carried by the PUCCH may include: when the user equipment is configured by the first base station to adopt a PUCCH format capable of carrying multiple carrier feedback, the user equipment HARQ-ACK bundling is employed within the carrier.

For example, if the eNB configures the UE to perform ACK/NACK information feedback using a PUCCH format (e.g., PUCCH Format 3) that can carry multiple carrier ACK/NACKs, the UE adopts HARQ-ACK bundling in each carrier.

Referring to the standard TS36.213, the user combines the HARQ information of all subframes in one HARQ feedback set into two HARQ-ACK bits by logical AND operation, corresponding to codeword 0 and codeword 1, respectively. The foregoing HARQ feedback set is only all downlink subframes corresponding to the feedback ACK/NACK information carried in one uplink subframe.

For example, if the eNB configures the UE to perform ACK/NACK transmission using a PUCCH format (eg, PUCCH Format 3) that can carry multiple carrier ACK/NACKs, the UE performs spatial HARQ-ACK bundling in each subframe (spatial HARQ-ACK bundling). And the UE adopts HARQ-ACK bundling (HARQ-ACK bundling) in each carrier. In this case, for a TDD carrier, a Format3 PUCCH carries a maximum of 11 bits, of which 10 bits are ACK/NACK information and 1 bit is SR information.

In another embodiment, in step 101 or step 205, reducing the number of information bits carried by the PUCCH may include: when the user equipment is configured by the first base station to adopt a PUCCH format capable of carrying multiple carrier feedback, the user equipment Spatial HARQ-ACK bundling is performed within the subframe, and HARQ-ACK bundling is employed within the carrier.

In another embodiment, in step 101 or step 205, when the user equipment is configured by the first base station to adopt a PUCCH format capable of carrying multiple carrier feedbacks, if the user equipment performs spatial HARQ-ACK bundling in a subframe, Or the user equipment adopts HARQ-ACK bundling in the carrier, or the user equipment performs spatial HARQ-ACK bundling in the subframe and adopts HARQ-ACK bundling in the carrier; Then, in step 102 or step 206, the UE transmits in a PUCCH format that can carry multiple carrier ACK/NACKs, for example, using PUCCH Format 3. And, the user equipment can transmit the PUCCH on the resource specified by the first base station to indicate power limitation.

In another embodiment, if the user equipment has only one TDD carrier, and is configured by the first base station to adopt a PUCCH format capable of carrying multiple carrier feedbacks (for example, PUCCH Format 3), in step 101 or step 205, the user The device adopts HARQ-ACK bundling in the carrier; and in step 102 or step 206, the user equipment adopts a PUCCH format (for example, PUCCH Format la/PUCCH Format lb) carrying only a single carrier feedback to the first base station in the subframe. Transmit PUCCH. This PUCCH format, which carries a single carrier feedback, can be consistent with the feedback form of ACK/NACK for a single TDD carrier in LTE Release 8, for backward compatibility.

It can be seen from the foregoing embodiment that, when the sum of the transmit power exceeds the maximum transmit power that the UE can support, the number of information bits carried by the PUCCH is reduced, and the transmission of the PUCCH of the SeNB is reserved as much as possible, and unnecessary transmission such as PDSCH can be reduced. Avoid excessive waste of resources. Example 2

The embodiment of the present invention provides a method for transmitting uplink control information, and the present invention is described from the base station side, and the same content as that of Embodiment 1 will not be described again. FIG. 3 is a schematic flowchart of a transmission method according to an embodiment of the present invention. As shown in FIG. 3, the transmission method includes:

Step 301: The base station receives a PUCCH that is transmitted by the user equipment in a certain subframe. The power of the user equipment that can be used to transmit the PUCCH does not reach the transmit power configured by the base station for transmitting the PUCCH. The number of information bits carried by the PUCCH is reduced.

In this embodiment, the eNB side receives the PUCCH sent by the UE. In a certain subframe, the eNB is expected to receive ACK/NACK information fed back by a certain UE, and the ACK/NACK information is received by the UE according to downlink data or signaling on the received PCC and/or SCC of the eNB (for example, The PDSCH is used to release the semi-persistently scheduled PDCCH) and is fed back.

If the PUCCH of the Format 3 sent by the UE is not detected on the reserved resource location allocated for the PUCCH Format 3 of the UE, the UE will detect on the PUCCH Format la/lb resource reserved for the UE. . If the eNB detects the PUCCH of the Format la/lb sent by the UE on the reserved PUCCH Format la/lb resource, the eNB considers that there are two possibilities: (1) The UE is not able to receive Corresponding downlink data or signaling carried on the SCC (for example, the PDCCH corresponding to the PDSCH is not correctly detected); (2) The UE's PUCCH power on the eNB is limited. The eNB retransmits the corresponding downlink data or signaling (for example, PDSCH) carried on the SCC corresponding to the subframe.

In this embodiment, the base station may configure a resource for the user equipment to indicate power limitation. The corresponding configuration information may be directly sent by the base station to the user equipment, or may be sent to the user equipment via other base stations; however, the invention is not limited thereto.

For example, the UE may be configured with a resource dedicated to transmitting PUCCH when power is limited by RRC signaling. The PUCCH may be transmitted on the resource for indicating power limitation, in a PUCCH format capable of carrying multiple carrier feedbacks, or in a PUCCH format carrying only a single carrier feedback.

The PUCCH format that can carry multiple carrier feedbacks may be PUCCH Format 3 or PUCCH Format lb with channel selection _0. The PUCCH format that only carries a single carrier feedback may be PUCCH Format la or PUCCH Format lb. However, the present invention is not limited thereto, and may be, for example, other PUCCH formats.

In this embodiment, the transmitting method may further include: the base station detecting the PUCCH on the resource for indicating power limitation.

For example, the eNB may detect a PUCCH sent by the UE, a PUCCH format carrying multiple carriers ACK/NACK, or a PUCCH format carrying a single carrier ACK/NACK on the resource allocated to the UE for power-limited resources. transmission.

In this embodiment, if the eNB fails to detect the PUCCH Format3 resource sent by the UE on the common resource for PUCCH Format3 transmission, the eNB detects the UE on the resource allocated for the PUCCH Format3 dedicated to the power allocation when the UE is allocated. Transmitted PUCCH Format3.

The eNB may first detect the PUCCH Format 3 sent by the UE on the resource allocated to the PUCCH Format3 for the UE when the power is limited, and then detect the PUCCH Format3 resource sent by the UE on the common resource for the PUCCH Format3 transmission. For example, if the eNB continuously detects PUCCH Format 3 in the restricted resource for a duration, the eNB may first detect on the restricted resource.

In this embodiment, if the eNB fails to detect the PUCCH Format la/lb resource sent by the UE on the common resource for PUCCH Format la/lb transmission, the eNB transmits the PUCCH when the dedicated power allocation is allocated for the UE. The PUCCH Format la/lb sent by the UE is detected on the resource of Format la/lb.

The eNB may also first transmit the PUCCH Format la/lb when the power allocation is reserved for the UE. The PUCCH Format la/lb sent by the UE is detected on the source, and the PUCCH Format la/lb resource sent by the UE is detected on the common resource for PUCCH Format la/lb transmission. For example, if the eNB continuously detects the PUCCH Format la/lb in the restricted resource for a duration, the eNB may first detect on the restricted resource.

In this embodiment, if the eNB is dedicated to power limitation, it transmits multiple carriers ACK/NACK.

The PUCCH format is transmitted on the PUCCH format or the PUCCH format resource carrying the single carrier ACK/NACK, and the PU1CH eNB reconfigures the UE's PUCCH transmission. The configuration of the PUCCH transmission may include configuring the transmit power of the PUCCH, but the present invention is not limited thereto.

If the eNB detects the PUCCH Format3 sent by the UE on the resource dedicated to the PUCCH Format3, the eNB interprets the content carried by the PUCCH Format3 and performs corresponding scheduling according to the content.

For example, if the eNB receives the ACK information of a certain transport block, the transport block will not be retransmitted; if the eNB receives the NACK information of a transport block, the transport block will be retransmitted. If the eNB receives the SR information, it will schedule the corresponding uplink scheduling for the UE. If the eNB receives the CQI information reported by the user, the eNB may refer to the CQI information when performing downlink transmission to the UE.

If the eNB detects the PUCCH Format3 resource sent by the UE in the normal resource for the PUCCH Format3 transmission, the eNB interprets the content carried by the PUCCH Format3, and performs corresponding scheduling according to the content.

It can be seen from the foregoing embodiment that, when the sum of the transmit power exceeds the maximum transmit power that the UE can support, the number of information bits carried by the PUCCH is reduced, and the transmission of the PUCCH of the SeNB is reserved as much as possible, and unnecessary transmission such as PDSCH can be reduced. Avoid excessive waste of resources. Example 3

The embodiment of the invention provides a device for transmitting uplink control information, which is applied to the user equipment side. The embodiment of the present invention corresponds to Embodiment 1, and the same content is not described again. 4 is a schematic structural diagram of a transmission apparatus according to an embodiment of the present invention. As shown in FIG. 4, the transmission apparatus 400 includes: an information processing unit 401 and an information transmission unit 402. The information processing unit 401 is in a certain subframe. When the power that can be used for transmitting the PUCCH is less than the transmit power for transmitting the PUCCH configured by the first base station for the user equipment, the number of information bits carried by the PUCCH is reduced; after the information transmission unit 402 transmits the number of information bits to the first base station PUCCH.

As shown in FIG. 4, the transmission device 400 may further include: a power determining unit 403, when transmitting a PUCCH to the second base station and the first base station, determining, by the first base station, a transmit power configured by the user equipment for transmitting the PUCCH Whether the sum of the transmit powers configured by the second base station for transmitting the PUCCH for the user equipment is greater than the maximum transmit power allowed by the user equipment;

The information transmission unit 402 is further configured to: when the sum of the transmit powers is greater than a maximum transmit power of the user equipment, and the transmit power of the second base station configured for the user equipment for transmitting the PUCCH is less than or equal to the maximum transmit allowed by the user equipment. At the time of power, the PUCCH is transmitted to the second base station by using the transmit power of the second base station configured for the user equipment for transmitting the PUCCH.

The information transmission unit 402 is further configured to: the sum of the transmit powers is greater than the maximum transmit power of the user equipment, and the transmit power of the second base station configured for the user equipment for transmitting the PUCCH is greater than the maximum transmit power allowed by the user equipment. The PUCCH is transmitted to the second base station at the maximum allowed transmit power.

In an embodiment, the information transmission unit 402 may be specifically configured to: when the user equipment is configured by the first base station to adopt a PUCCH format capable of carrying multiple carrier feedback, adopting a PUCCH format carrying only a single carrier feedback in the subframe And transmitting ACK/NACK information corresponding to the first cell of the first base station.

The information transmission unit 402 is further configured to: abandon the ACK/NACK information corresponding to the second cell (other than the first cell) of the first base station in the subframe; and abandon the period corresponding to the first base station Sexual CQI information. In another embodiment, the information processing unit 401 is specifically configured to: perform spatial HARQ-ACK bundling in a subframe when the user equipment is configured by the first base station to adopt a PUCCH format capable of carrying multiple carrier feedbacks.

In another embodiment, the information processing unit 401 may be specifically configured to: when the user equipment is configured by the first base station to adopt a PUCCH format capable of carrying multiple carrier feedback, adopt HARQ-ACK binding in the carrier.

In another embodiment, the information processing unit 401 may be specifically configured to: perform spatial HARQ-ACK bundling in a subframe when the user equipment is configured by the first base station to adopt a PUCCH format capable of carrying multiple carrier feedback, and The HARQ-ACK bundle is used in the carrier.

In another embodiment, the information transmission unit 402 may be specifically configured to: transmit the PUCCH on a resource specified by the first base station to indicate power limitation.

In another embodiment, the information processing unit 401 employs HARQ-ACK bundling in the carrier when the user equipment has only one TDD carrier and is configured by the first base station to adopt a PUCCH format capable of carrying multiple carrier feedbacks; The transmitting unit 402 transmits the PUCCH to the first base station in the PUCCH format in which only a single carrier feedback is carried in the subframe.

The embodiment of the invention further provides a user equipment, which includes the uplink control information transmission device as described above.

FIG. 5 is a schematic block diagram showing the system configuration of the user equipment 500 according to the embodiment of the present invention. As shown in FIG. 5, the user equipment 500 can include a central processing unit 100 and a memory 140; the memory 140 is coupled to the central processing unit 100. It is worth noting that the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.

In one embodiment, the functionality of the transmission device of the upstream control information may be integrated into the central processor 100. The central processing unit 100 can be configured to implement the transmission method of the uplink control information as described in Embodiment 1. For example, it may be configured to: when the power that can be used for transmitting the PUCCH in a certain subframe does not reach the transmit power for transmitting the PUCCH configured by the first base station for the user equipment, reduce the number of information bits carried by the PUCCH; The PUCCH after reducing the number of information bits is transmitted to the first base station.

In another embodiment, the transmission device of the uplink control information may be configured separately from the central processing unit 100. For example, the transmission device of the uplink control information may be configured as a chip connected to the central processing unit 100, and implemented by the control of the central processing unit. The function of the transmission device of the uplink control information. As shown in FIG. 5, the user equipment 500 may further include: a communication module 110, an input unit 120, an audio processing unit 130, a display 160, and a power supply 170. It should be noted that the user equipment 500 does not have to include all the components shown in FIG. 5; in addition, the user equipment 500 may also include components not shown in FIG. 5, and reference may be made to the prior art.

As shown in FIG. 5, central processor 100, also sometimes referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device that receives input and controls each of user devices 500. The operation of the part.

The memory 140 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable device. The above-mentioned information related to the failure can be stored, and a program for executing the related information can be stored. And the central processing unit 100 can execute the program stored in the memory 140 to implement information storage or processing and the like. The functions of other components are similar to those of the existing ones and will not be described here. The various components of user device 500 may be implemented by dedicated hardware, firmware, software, or a combination thereof without departing from the scope of the invention.

It can be seen from the foregoing embodiment that, when the sum of the transmit power exceeds the maximum transmit power that the UE can support, the number of information bits carried by the PUCCH is reduced, and the transmission of the PUCCH of the SeNB is reserved as much as possible, and unnecessary transmission such as PDSCH can be reduced. Avoid excessive waste of resources. Example 4

The embodiment of the invention provides a transmission device for uplink control information, which is applied to a base station side. The embodiment of the present invention corresponds to Embodiment 2, and the same content is not described again.

FIG. 6 is a schematic diagram of a configuration of a transmission apparatus according to an embodiment of the present invention. As shown in FIG. 6, the transmission apparatus 600 includes: an information receiving unit 601, which receives a PUCCH transmitted by a user equipment in a certain subframe; wherein, the user The device reduces the number of information bits carried by the PUCCH when the power used to transmit the PUCCH does not reach the transmit power configured by the base station for transmitting the PUCCH.

As shown in FIG. 6, the transmission device 600 may further include: a resource configuration unit 602, configured to indicate, by the user equipment, a resource limited resource. The PUCCH may be transmitted on the resource for indicating power limitation, in a PUCCH format capable of carrying multiple carrier feedbacks or in a PUCCH format carrying only a single carrier feedback.

As shown in FIG. 6, the transmission device 600 may further include: an information detecting unit 603, where the indication is used The PUCCH is detected on a power limited resource.

The embodiment of the invention further provides a base station, which comprises the uplink control information transmission device as described above. FIG. 7 is a schematic diagram of a structure of a base station according to an embodiment of the present invention. As shown in FIG. 7, base station 700 can include: a central processing unit (CPU) 200 and memory 210; and memory 210 coupled to central processor 200. The memory 210 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processing unit 200 to receive various information transmitted by the user equipment and to transmit request information to the user equipment.

In one embodiment, the functionality of the transmission device of the upstream control information may be integrated into the central processor 200. The central processing unit 200 can be configured to implement the transmission method of the uplink control information as described in Embodiment 2.

In another embodiment, the transmission device of the uplink control information may be configured separately from the central processing unit. For example, the transmission device of the uplink control information may be configured as a chip connected to the central processing unit 200, and the uplink processor controls the uplink. The function of the transmission device that controls the information.

In addition, as shown in FIG. 7, the base station 700 may further include: a transceiver 220, an antenna 230, and the like; wherein the functions of the above components are similar to those of the prior art, and details are not described herein again. It should be noted that the base station 700 does not have to include all of the components shown in FIG. 7; in addition, the base station 700 may also include components not shown in FIG. 7, and reference may be made to the prior art.

It can be seen from the foregoing embodiment that, when the sum of the transmit power exceeds the maximum transmit power that the UE can support, the number of information bits carried by the PUCCH is reduced, and the transmission of the PUCCH of the SeNB is reserved as much as possible, and unnecessary transmission such as PDSCH can be reduced. Avoid excessive waste of resources. Example 5

The embodiment of the present invention further provides a communication system, including the user equipment as described in Embodiment 3 and the base station as described in Embodiment 4. The same contents as those of Embodiments 1 to 4 will not be described again.

FIG. 8 is a schematic diagram of a configuration of a communication system according to an embodiment of the present invention. As shown in FIG. 8, the communication system 800 includes a user equipment 801 and a first base station 802. among them,

The user equipment 801 reduces the number of information bits carried by the PUCCH when the power that can be used for transmitting the PUCCH in a certain subframe does not reach the transmission power configured by the first base station 802 for the user equipment 801 to transmit the PUCCH; The first base station 802 transmits a PUCCH after reducing the number of information bits; The first base station 802 receives the PUCCH transmitted by the user equipment 801 in the subframe.

As shown in FIG. 8, the communication system 800 may further include:

The second base station 803 receives the PUCCH that the user equipment 801 transmits for the transmission power of the PUCCH configured by the second base station 803 for the user equipment 801.

The embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a user equipment, the program causes a computer to perform transmission of uplink control information as described in Embodiment 1 above in the user equipment. method.

The embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the transmission method of the uplink control information as described in Embodiment 1 above in the user equipment.

The embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a base station, the program causes a computer to execute a transmission method of the uplink control information as described in Embodiment 2 above in the base station.

The embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the transmission method of the uplink control information as described in Embodiment 2 above in the base station.

The above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software. The present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps. The present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein. An application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof. One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.

The present invention has been described in connection with the specific embodiments thereof, and it should be understood by those skilled in the art that these descriptions are not intended to limit the scope of the invention. A person skilled in the art can make various modifications and changes to the invention in accordance with the spirit and the principles of the invention, which are also within the scope of the invention.

Claims

claims

1. A transmission device for uplink control information. The transmission device includes:

An information processing unit that reduces the number of information bits carried by the PUCCH when the power that can be used to transmit the PUCCH in a certain subframe does not reach the transmit power configured by the first base station for the user equipment to transmit the PUCCH; Information transmission The unit transmits the PUCCH with the reduced number of information bits to the first base station.

2. The transmission device according to claim 1, wherein the transmission device further includes:

The power judging unit, when transmitting the PUCCH to the second base station and the first base station respectively, judges that the transmit power configured by the first base station for transmitting the PUCCH for the user equipment is different from the transmit power configured by the second base station for the user equipment. Whether the sum of the transmit powers configured by the device for transmitting PUCCH is greater than the maximum transmit power allowed by the user equipment;

The information transmission unit is also configured to operate when the sum of the transmit powers is greater than the maximum transmit power of the user equipment, and the transmit power configured by the second base station for transmitting the PUCCH for the user equipment is less than or equal to the When the maximum transmit power allowed by the user equipment is the transmit power configured by the second base station for the user equipment to transmit the PUCCH, the PUCCH is transmitted to the second base station.

3. The transmission device according to claim 1, wherein the information transmission unit is specifically configured to: when the user equipment is configured by the first base station to adopt a PUCCH format capable of carrying multiple carrier feedbacks, The PUCCH format that only carries single carrier feedback is used in the subframe to transmit ACK/NACK information corresponding to the first cell of the first base station.

4. The transmission device according to claim 3, wherein the information transmission unit is further configured to: give up transmission of the second cell of the first base station except the first cell in the subframe. of

ACK/NACK information; and giving up transmitting the periodic CQI information corresponding to the first base station.

5. The transmission device according to claim 1, wherein the information processing unit is specifically configured to: when the user equipment is configured by the first base station to adopt a PUCCH format capable of carrying multiple carrier feedbacks, Spatial HARQ-ACK bundling is performed within the frame.

6. The transmission device according to claim 1, wherein the information processing unit is specifically configured to: when the user equipment is configured by the first base station to adopt a PUCCH format capable of carrying feedback from multiple carriers, on the carrier HARQ-ACK bundling is used.

7. The transmission device according to claim 1, wherein the information processing unit is specifically configured to: when the user equipment is configured by the first base station to adopt a PUCCH format capable of carrying multiple carrier feedbacks In the formula, spatial HARQ-ACK bundling is performed within the subframe, and HARQ-ACK bundling is adopted within the carrier.

8. The transmission device according to claim 1, wherein the information transmission unit is specifically configured to: transmit the PUCCH on resources designated by the first base station and used to indicate power limitation.

9. The transmission device according to claim 1, wherein the information processing unit is used when the user equipment has only one TDD carrier and is configured by the first base station to adopt a PUCCH format capable of carrying feedback from multiple carriers. , using HARQ-ACK bundling within the carrier; and

The information transmission unit adopts a PUCCH format that only carries single carrier feedback in the subframe, and transmits the PUCCH to the first base station.

10. A transmission device for uplink control information. The transmission device includes:

The information receiving unit receives the PUCCH transmitted by the user equipment in a certain subframe; wherein the power used by the user equipment to transmit the PUCCH does not reach the transmit power configured by the base station for the user equipment to transmit the PUCCH. , reduce the number of information bits carried by the PUCCH.

11. The transmission device according to claim 10, wherein the transmission device further includes: a resource configuration unit configured to configure resources for indicating power limitation for the user equipment.

12. The transmission device according to claim 11, wherein the PUCCH is on the resource used to indicate power limitation, in a PUCCH format capable of carrying feedback from multiple carriers or in a PUCCH format that only carries feedback from a single carrier be transmitted.

13. The transmission device according to claim 11, wherein the transmission device further includes: an information detection unit configured to detect the PUCCH on the resource used to indicate power limitation.

14. A communication system, the communication system includes:

The user equipment, when the power that can be used to transmit the PUCCH in a certain subframe does not reach the transmit power configured by the first base station for the user equipment to transmit the PUCCH, reduce the number of information bits carried by the PUCCH; and Transmitting the PUCCH with the reduced number of information bits to the first base station;

15. The communication system according to claim 14, wherein the communication system further includes: a second base station, receiving the transmit power configured by the user equipment for transmitting PUCCH by the second base station. to transmit the PUCCH.

16. The communication system according to claim 14, wherein the first base station configures resources for indicating power-limited resources for the user equipment.